Feed-controlling device.



G. HA @ILM/XN.

FEED CONTROLLING DEVICE.

APPLICAUON HLEDAPR.H.1914.

Patented Nov. 26, 19H5.

LSQSO.

ing -a lateral concavity 24 engaging the piston rod 14. This blo k 'is herein mounted 1n a recess Q5 provided in the cylinder head 13,

'- whereby the feed-controlling device 1s supported upon and carried by the feed cylinder.. As herein/shown, the feed-restraining device is normally inoperative,that A1s to say, it is provided with means cony stantly tending to release the same, such till .be readily turned by; y atory l and 4, thisis the 'latter extends into the cylinder.

means in the present instance comprising `a spring 26, which, in the form shown, en-

circles a stem 27 projecting from the block 23. One end of this spring 1s seated against a souldei 28 uponthehlock, while the other en is seated against the bottom of a recess Q9, Wit in which the spring is depressed.

rlfhe sp ingV when thus arranged tends to 4urge t e block 23 out of engagement with the pis on rod 14.. As a means or applying the re training 'device and regulating the controlexercised thereby upon the feeding ing blc piston pressure, upon the suit 'the requirements of the work. inlfians for pifeventing the nut from becoming accidentally unscrewed from the threaded stem, the latter is herein provided with an enlargement or head 3,1.

Referring to the form shown in Figs. 3

same in all essential particulars as that already described, Vand comprises afriction block 39., located in a recess 33, said block having astem 34 encircled by a spring 35 tendfng to move the block out of engagement with the piston rod 19. The nut 3G, threaded onto the stem, serves as a means for regulating the however, differs from`that already described, in that the feed cylinder 17 is provided with an encircling collar 37, which is split at 38 and provided with a clamping bolt 39 havnut .40. This clamping bolt passes through a transverse perforation 41 in the collar.,V and through a lateral recess 42 formed partly in the Wall of the cylinder 17 and partly in the cylinder head 18, which lBy this means, the collar 37 and cylinder head 18 are interlocled with the cylinder 17 against cndwise movement. As a means for causing the collar to contract the cylinder about the cylinder head 'which it cncircles, in orderto bind the latter, the cylinder is herein provided with a longitudinal slot 43.

In the operati e of ei [her form of the invention, the full ect' of the feeding means means, I have heiein provided a nut 30 hav-- Asa' feed. This form,A

may be utilized by turning the regulating nut to allow the spring to disengage the frictional restraining device. If, however, the character of the rock should be so soft as to require a 'less .degree of pressure, the action of the feeding device may be regulated to a nicety by simply turning the regulating nut to the proper extent. If, during the operation of the drill, the drill-bit should strike a soft spot and tend to jump forward suddenly, the restraining device imposes such restraint thereon as to prevent the drill-bit from becoming wedged or jammed.

While I have herein shown and describedv two specic forms or embodiments of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to two specific applications thereof, it is to be understood that the invention is limited neither to the mere details or relative arrangement of parts, nor to its specific embodiments herein shown, but that extensive deviations from the illustrated forms or embodiments of the invention may be made, without departing from the principles thereof.

Having thus described two illustrative embodiments of my invention, what I claim and desire by Letters Patent'to secure is:

v1,'The combination with an impact tool and pressure fluid feeding means therefor comprising a feedpiston and cylinder;v one of said elements together with said impact tool'forming a unitary structure; of 4feed ,regulating and engageable with said piston.

2. The combination with an impact tool and pressure fluid feeding means therefor comprising a feed piston and cylinder having a cylinder head, one of said elements together with said impact tool forming a umtary structure; of frictional feed regulating means supported by said cylinder head.

3. The combination with an impact'tool' andpreSSure Huid feeding means therefor comprising a feed piston having a piston rod and afcylinder having a cylinder head; one of said elements together with said im act tool formingr` a unitary structure; of eed regulating means comprising a straining device mounted on said cylinder head and acting on said feed-piston rod.

4. The combination with an impact tool and pressure fluid feeding'means therefor comprising a feed piston member and a feed cylinder member, one of said members together with said impact tool. constituting a' unitary structure; of feed regulating means supported by the other of said mem- -bers and engaging the rst member.

5. The combination with an impact tool and pressure fluid feeding means therefor including a feed piston. acylinder, said cylinder havingv a chamber therein; of a `member disposed in said means supported by said cylinder rod therefor, andl vchamber and vmovable 'into frictional engagement With said piston rod, and means for adjusting the Vposition of said member relative to said piston rod. Y'

6. The combination with an impact tool and pressure uid feeding means therefor including a feed piston, a rod therefor, a

cylinder and cylinder head, said cylinder pendent of said member head having a chamber therein; of a mem ber disposed in said lchamber and movable into frictional engagement vvith said piston rod, resilient means 'normally tending to.

hold said member in.inoperative position, and means for' controlling said reslhent means.

7. The combination'with an iliipact tool.

and pressure actuated feeding means therefor including a feedpiston, a rodtherefor, and a cylinder g2 of a member carried by said cylinderv and having a concave surfacel engageable withsaid piston rod, means inde normally tending to render said member ineffective andA adjusting means for varyingthe pressure of vsaid member on said piston.

8. -The combination 4With an impact teo] and pressure liuid feeding means therefor including a feedpiston, a. rod therefor, and

Y a cylinder havinga transverse recess therein;

of a. member reciprocable in said recess and having a`concave `portion engage-.

able with said piston rod, resilient means surrounding said'member at a point adjacent said Aconcave' portion normally resisting longitudinal movement thereof. and sup plemental means for adjusting said member longitudinally.

. 9. The combination With an impact tool and pressure Huid feeding means therefor 'into engagement With including a' feed piston, a rod therefor, and a cylinder having an opening therein; of a split collar carried on said cylinder, means for 'clamping said collar to said cylinder, and means carried L by saidcollar and reciprocable in the opening in said cylinder said piston rod.

if). The combination with an impact 'tool a rod therefor,. a

tudinal movement relative to said cylinder:

11. The combination atedimpact tool having for holding thelsame against the Work including a feed piston justable .frictional means carried 'by said with a hammer oper pressure fluid means i and cylinder; of adcylinder 'and engageable With said piston for Y controllingthe feeding mechanism,'and sup plemental means coperating therewitlrand' normally tending to render said last;` meub` tioned means ineffective for' rendering gradualthe. release of said frictional meansiffrom' said piston. L

12. The combination with an impact tool and pressure llujifeeding including a feed piston and a feed cylinder, one-of said members together with saidinr` pact toel'forming av unitary structure, a pismeans therefor t0n rod, a collar disposed adjacent one end of said -cylinder and Aattached thereto. a member carried Within said collar and frictionally engageable with 'said pistdu rod, manually controlled means for adjusting said 'member into engagement With said.'v piston rod and outof engagement therewith,r

and cooperating resilient means a gradual disengagement of said frictional member `from said piston rod as `saidman- 'ually controlled means is released.v Y

In testimony whereof, I have signed name to this specification, in the preseneeofv two subscribing Witnesses',

, GEORGE .Hg GILMAN.

Witnesses:

A. me, C. J. Jorma. 

